On Mon, 6 May 2019 16:44:47 +0000, Seymour J Metz wrote:

>Not that I know of, other then the SMF records for the input and output.
>________________________________________
>From: Paul Gilmartin
>Sent: Friday, May 3, 2019 1:42 PM
>
>When IEBCOPY reblocks a module, does it leave any audit trail?  That
>might be of interest in case of the OP's problem.
>
Amidst the nattering about 32760 vs. half-track vs. 4KiB vs. ...
I suggested coding BLKSIZE=0.  That received neither support nor
opposition.  So, I wonder:

Does coding BLKSIZE=0 ever lead to complete failure of a utility or product?
I encountered one many years ago.  It was promptly fixed by APAR.

Does BLKSIZE=0 ever lead to suboptimum performance?

There might be trivial exceptions for unlabelled tapes with DISP=MOD
or for IEBGENER where SYSUT1 is already adversely blocked.

-- gil

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